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Finding the Fourth Proportional to 160.60, 221.64 and 90.66

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Solution

The fourth proportional to 160.60, 221.64 and 90.66 is: 125.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.60 : 221.64 = 90.66 : x
  2. Step 2: Convert to fraction form
    160.60/221.64 = 90.66/x
  3. Step 3: Cross multiply
    160.60x = 221.64 × 90.66
  4. Step 4: Simplify right side
    160.60x = 20,093.88
  5. Step 5: Solve for x
    x = 20,093.88/160.60
  6. Step 6: Final answer
    x = 125.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.